On 16.11.20 17:12, Andy Lutomirski wrote:
On Mon, Nov 16, 2020 at 7:23 AM Juergen Gross <jgr...@suse.com> wrote:Xen PV guests don't use IST. For double fault interrupts switch to the same model as NMI. Signed-off-by: Juergen Gross <jgr...@suse.com> --- arch/x86/include/asm/idtentry.h | 3 +++ arch/x86/xen/enlighten_pv.c | 8 +++++++- arch/x86/xen/xen-asm.S | 2 +- 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h index 3505c0396fa5..b35825392547 100644 --- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -611,6 +611,9 @@ DECLARE_IDTENTRY_RAW(X86_TRAP_DB, xenpv_exc_debug); /* #DF */ DECLARE_IDTENTRY_DF(X86_TRAP_DF, exc_double_fault); +#ifdef CONFIG_XEN_PV +DECLARE_IDTENTRY_RAW_ERRORCODE(X86_TRAP_DF, xenpv_exc_double_fault); +#endif /* #VC */ #ifdef CONFIG_AMD_MEM_ENCRYPT diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 9f5e44c1f70a..803fbcb398c4 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -571,6 +571,12 @@ DEFINE_IDTENTRY_RAW(xenpv_exc_nmi) exc_nmi(regs); } +DEFINE_IDTENTRY_RAW_ERRORCODE(xenpv_exc_double_fault) +{ + /* On Xen PV, DF doesn't use IST. The C part is the sane as native. */I would like to think that code is sane, but you probably meant "same".
Oh, this is the result of copy and paste. Now we have two sane functions. :-) Juergen
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